Find a rectangular equation for the curve and describe the curve.x = 
, y = 
t; -2 ? t ? 2
A. x = 
; portion of an ellipse
B. x = 
; portion of an ellipse
C. x = 
; portion of an ellipse
D. x = 
; portion of a circle with radius 2
Answer: A
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Solve the problem.What region in the xy-plane maximizes the value of 
?R
A. The ellipse 100x2 + 49y2 = 1
B. The ellipse 
+ 
= 1
C. The ellipse 
+ 
= 1
D. The ellipse 49x2 + 100y2 = 4900
Solve the triangle.a = 8, b = 14, c = 16
A. A = 28°, B = 61°, C = 91° B. A = 30°, B = 61°, C = 89° C. A = 32°, B = 59°, C = 89° D. no triangle
Solve the logarithmic equation.log8x = 4
A. 4096 B. 100,000,000 C. 32 D. 65,536
Solve.A loaded moving truck is traveling 20 mph faster than a freight train. In the time it takes the train to travel 90 miles, the truck travels 150 miles. Find the speed of the truck.
A. 10 mph B. 100 mph C. 50 mph D. 20 mph